The post nasal drip originates in the nose and/or sinuses, so-called Rhinosinusitis. Not infrequently it is associated with nasal polyps. The cause may be allergic, irritant (cigarette smoke or occupational exposure to irritants) or infectious, and the best tactic is avoidance. Effective treatment often requires a combination of medications (nasal decongestants and inhaled steroids, in conjunction with daily nasal washes or irrigations.
It can be helpful to take a careful inventory of all allergens and irritants in your home and work environment.
Most academic medical centers, hospitals and clinics will have a, Cough Clinic. You might benefit from consultation with the medical staff of one of these clinics.
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